No. 225-20.2

Service
Technical Information
225/20 ENU
WLP0
3
WLP0 - Re-Programming PDK Control Unit (Workshop Campaign)
Important:
CRITICAL WARNING - This campaign includes steps where control unit(s) in the vehicle will be
programmed with the PIWIS Tester. The vehicle voltage must be maintained between 13.5 volts and 14.5
volts during this programming. Failure to maintain this voltage could result in damaged control unit(s).
Damage caused by inadequate voltage during programming is not a warrantable defect. The technician
must verify the actual vehicle voltage in the PIWIS Tester before starting the campaign and also document
the actual voltage on the repair order.
Model Year:
2021
Model Line:
911 (992)
Concerns:
PDK control unit
Information:
Updated software for the PDK control unit is available for the affected vehicles.
Action
Required:
Re-program the PDK control unit using the PIWIS Tester with installed test software version 39.900.030
(or higher).
Information
In addition to the PDK control unit, the DME control unit is also re-programmed automatically. It takes
approx. 15 minutes in total to program both control units.
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
Required tools
Tools:
Information
The current 911 (992) is equipped with either a lithium starter battery (I-no. J2A) or an AGM starter
battery (I-no. J0V, J4K) as standard.
This depends on the following:
•
Country version
•
Model type
•
Vehicle equipment
Lithium starter batteries must only be charged using a suitable battery charger that has a current
and voltage-controlled charge map.
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For further information about the battery chargers to be used, see  Workshop Manual '270689
Charging battery/vehicle electrical system'.
•
•
Battery charger with a current rating of at least 90 A and, if required, also with a current and
voltage-controlled charge map for lithium starter batteries, e.g. VAS 5908 battery charger
90A
9900 - PIWIS Tester 3 with PIWIS Tester test software version 39.900.030 (or higher) installed
Preparatory work
NOTICE
Fault entry in the fault memory and control unit programming aborted due to undervoltage.
•
Increased current draw during diagnosis or control unit programming can cause a drop in voltage, which
can result in one or more fault entries and the abnormal termination of the programming process.

Before starting control unit programming, connect a suitable battery charger with a current rating of at
least 90 A to the vehicle.
NOTICE
Control unit programming will be aborted if the WLAN connection is unstable
•
An unstable WiFi connection can interrupt communication between the PIWIS Tester and the vehicle
communication module (VCI). As a result, control unit programming may be aborted.

During control unit programming, always connect the PIWIS Tester to the vehicle communication module
(VCI) via the USB cable.
NOTICE
Control unit programming will be aborted if the driver's key is not recognized
•
If the driver's key is not recognized in the vehicle, programming cannot be started or will be interrupted.

Place the driver's key with the back facing down in the area in front of the storage compartment under
the armrest (emergency start tray) in order to guarantee a permanent radio link between the vehicle and
driver's key.
Information
The procedure described here is based on the PIWIS Tester 3 software version 39.900.030.
The PIWIS Tester instructions take precedence and in the event of a discrepancy, these are the
instructions that must be followed.
A discrepancy may arise with later software versions for example.
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Service
Technical Information
Work Procedure: 1
225/20 ENU
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Connect a suitable battery charger, e.g. Battery charger 90A, to the jump-start terminals in the
luggage compartment and switch it on.
2
Place the driver's key with the back facing down in the
area in front of the storage compartment under the
armrest (emergency start tray) in order to guarantee
a permanent radio link between the vehicle and
driver's key  Emergency start tray.
3
Connect 9900 - PIWIS Tester 3 to the vehicle
communication module (VCI) via the USB cable.
Then connect the communication module to the
vehicle and switch on the PIWIS Tester.
Emergency start tray
4
Switch on ignition.
5
On the PIWIS Tester start screen, call up the 'Diagnostics' application.
The vehicle type is then read out, the diagnostic application is started and the control unit selection
screen is populated.
Re-programming PDK control unit
WARNING
Electrically moved side windows and rear spoiler
•
Danger of limbs being trapped or severed
•
Risk of damage to components

Do not reach into the danger area.

Keep third parties away from the danger area.

Do not move components or tools into the danger area.
Work Procedure: 1
Re-program PDK control unit.
The basic procedure for control unit programming is described in the Workshop Manual 
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester'.
For specific information on control unit programming during this campaign, see the table
below:
Required PIWIS Tester software version:
39.900.030 (or higher)
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Type of control unit programming:
Control unit programming using the 'Automatic
programming' function for the PDK control unit:
'Transmission electronics (PDK II)' control unit
– 'Coding/programming' menu – 'Automatic
programming' function.
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
During the programming sequence, the DME
control unit is re-programmed first, then the
transmission control unit is re-programmed.
Programming sequence:
Both control units are then re-codedautomatically.
Do not interrupt programming and coding.
Once the control units have been programmed and
coded, you will be prompted to switch the ignition off
and then back on again after a certain waiting time.
Backup documentation of the new software
versions is then performed.
The programming sequence takes
(approx.):
15 minutes
Software versions programmed during
this campaign:
Transmission control unit
Software version:
•
0534 (or higher)
Software Part No.:
•
•
•
•
992.927.156.AE (911 Carrera)
992.927.153.BF (911 Carrera S)
992.927.110.Q (911 Turbo)
992.927.109.Q (911 Turbo S)
Following control unit programming, the software
version and software part number can be read out of
the PDK control unit in the 'Extended identifications'
menu using the PIWIS Tester.
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Procedure in the event of abnormal
termination of control unit programming:
• Switch ignition off and then on again.
• Read out and erase fault memories  Workshop
Manual '9X00IN Basic instructions and procedure
for control unit programming using the PIWIS Tester section on "Subsequent work"'.
• Repeat control unit programming by restarting
programming.
Procedure in the event of other error
messages appearing during the
programming sequence:
 Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - section on "Fault finding"'.
Concluding work
Work Procedure: 1
Read out and erase the fault memories of all control units.
1.1
Press •F7“ in the control unit selection screen ('Overview' menu) to call up the Additional
menu.
1.2
Select the function “Read all fault memories
and erase if required” and press •F12“
('Next') to confirm your selection  Erasing
fault memories.
The fault memories of the control units are
read out.
1.3
Once you have read out the fault memories,
check the fault memory entries.
Erasing fault memories
Information
If control units are found to have faults that
are not caused by control unit programming, these must first be found and corrected. This
work cannot be invoiced under the workshop campaign number.
1.4
Press •F8“ to delete fault memory entries.
1.5
Press •F12“ ('Yes') in response to the question as to whether you really want to delete all
fault memory entries.
The faults stored in the fault memories of the various control units are deleted.
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Information
If fault memory entries for individual control units cannot be deleted, proceed as follows:
1.6
•
Switch off ignition.
•
Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.
•
Lock the vehicle using the driver’s key.
•
Wait approx. 1 minute before unlocking the vehicle again.
•
Start the engine, leave it running for a short time and then stop it again.
•
Switch off the ignition and wait approx. 10 seconds before switching it back on again.
•
Plug the PIWIS Tester diagnostic connector into the diagnostic socket again and restore
communication with the vehicle.
•
Read out the fault memory again and delete any fault memory entries that are stored.
Once you have erased the fault memories,
select the 'Overview' menu to return to the
control unit selection screen  Control unit
selection.
Control unit selection
WARNING
Electrically moved rear spoiler
•
Danger of limbs being trapped or severed
•
Risk of damage to components

Do not reach into the danger area.

Keep third parties away from the danger area.

Do not move components or tools into the danger area.
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2
Manually retract the rear spoiler, which extended automatically during programming.
To do this, select the 'CAR' – 'DRIVE' menu in the PCM and then select the 'Spoiler' function and
press and hold the spoiler button until the rear spoiler is fully retracted.
3
Switch off ignition.
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Disconnect the PIWIS Tester from the vehicle.
Information
Connect the PIWIS Tester to a network as soon as possible and log into the PPN in order to transfer
the backup documentation created during this campaign to the PAG systems.
5
Switch off and disconnect the battery charger.
6
Enter the campaign in the Warranty and Maintenance booklet.
Warranty processing
Scope 1:
Working time:
Re-programming PDK control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and erasing fault memories
Labor time: 57 TU
 Damage Code WLP0 066 000 1
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.
© 2020 Porsche Cars North America, Inc.
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